package com.itheima.interceptor;

import com.itheima.pojo.Result;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import net.bytebuddy.asm.Advice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request,HttpServletResponse response,Object handler)throws Exception{
        //令牌验证
        String token= request.getHeader("Authorization");
        try{
            //从redis中获取相同token
            ValueOperations<String,String> operations= stringRedisTemplate.opsForValue();
            String redisToken=operations.get(token);
            if(redisToken==null){
                //token失效了
                throw new RuntimeException();
            }
            Map<String,Object> claims= JwtUtil.parseToken(token);
            //将业务数据存到ThreadLocal中
            ThreadLocalUtil.set(claims);
            return true;
        }catch (Exception e){
            response.setStatus(401);
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();
    }
}
